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GDIEngine Mitsubishi GDI (direct injection technology) |
In internal combustion engines, gasoline direct injection is a latest variant of fuel injection employed in modern two- and four- stroke petrol engines. The petrol/gasoline is highly pressurised, and injected via a common rail fuel line directly into the combustion chamber of each cylinder, as opposed to conventional multi-point fuel injection that happens in the intake tract, or cylinder port. In some applications, gasoline direct injection enables a stratified fuel charge (ultra lean burn) combustion for improved fuel efficiency, and reduced emission levels at low load. The major advantages of a GDI engine are increased fuel efficiency and high power output. In addition, the cooling effect of the injected fuel, and the more evenly dispersed mixtures allow for more aggressive ignition timing curves. Emissions levels can also be more accurately controlled with the GDI system. The cited gains are achieved by the precise control over the amount of fuel and injection timings which are varied according to the load conditions. In addition, there are no throttling losses in some GDI engines, when compared to a conventional fuel injected or carbureted engine, which greatly improves efficiency, and reduces 'pumping losses' in engines without a throttle plate. Engine speed is controlled by the engine control unit/engine management system (EMS), which regulates fuel injection function and ignition timing, instead of having a throttle plate which restricts the incoming air supply. Adding this function to the EMS requires considerable enhancement of its processing and memory, as direct injection plus the engine speed management must have very precise algorithms for good performance/driveability. |
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News
01:48, 31.07.2012
Good topic
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02:37, 12.12.2011
Я дрочу на этот автомобиль!!!
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22:51, 30.11.2011
its butifoul car opel germany 2011
thanks
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15:34, 03.09.2011
Bardzo podobny z lini bocznej jest do Mercedesa W212 ;)
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Video
17:03, 29.07.2011
was that real ?
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19:25, 19.07.2011
Very educating weblog, bookmarked the web page in interest to see extra!
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04:34, 06.06.2011
чаму б і не:)
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